A kind of LED circuit board
[technical field]
The utility model relates to automotive lighting field, particularly relates to a kind of LED circuit board.
[background technology]
At present, LED is widely used in automobile lamp, and LED automobile lamp generally includes the elements such as LED lamp, power drives part, radiating piece, and connects the power supply copper cash of each element.Due to the narrow space in automobile lamp, and traditional power supply copper cash space shared when cabling is comparatively large, and stops the heat that each element operationally produces.Thus cause the service life reducing LED automobile lamp, reduce the traffic safety of driver, in addition, change LED frequently, what add driver uses car cost.
Therefore, be necessary to propose a kind of LED circuit board, avoid the generation of above-mentioned situation, can reasonably utilize the space in car light and there is good radiating effect.
[utility model content]
The utility model provides a kind of LED circuit board, solves in prior art the problem large, radiating effect is poor and service life is low that takes up room.
For achieving the above object, a kind of LED circuit board that the utility model provides, comprise circuit board, hot conduits, LED module and radiating subassembly, described circuit board is attached on described hot conduits, described LED module and described circuit board are electrically connected, described hot conduits to insert in described radiating subassembly away from one end of described LED module and is fixed together with described radiating subassembly, and the heat produced during described LED module work, conducts to described radiating subassembly through described hot conduits and dispel the heat.
Preferably, described LED module comprises substrate and LED light source, and the bottom surface of described substrate has line layer to be electrically connected with described circuit board, and described LED light source is fixed on the end face of described substrate away from described bottom surface.
Preferably, described substrate is heat-conducting substrate, with the heat conduction produced by described LED light source to described hot conduits.
Preferably, described radiating subassembly comprises radiator and is fixed on the fan on described radiator.
Preferably, described radiator comprises connecting portion, fin portion and fixed part, described connecting portion has accommodation space, described hot conduits is accommodated and is fixed in described accommodation space, described fin portion is positioned at described connecting portion one end away from described hot conduits, and described fixed part vertically extends from described fin portion.
Preferably, described fan is fixed on described fixed part.
Preferably, the quantity of described LED module is 3, and is spacedly distributed in the surface of described hot conduits, and the angle formed between adjacent two described LED modules is 120 degree.
Preferably, the quantity of described LED module is 4, and is spacedly distributed in the surface of described hot conduits, and the angle formed between adjacent two described LED modules is 90 degree.
Preferably, described hot conduits is the metal catheter of hollow, and working fluid is housed.
Preferably, described hot conduits and described radiator are fixed together by the mode of welding.
Above-mentioned LED circuit board, by the circuit board with LED module being fixed on the surface of hot conduits, and hot conduits and radiating subassembly are fixed together, the hot-fluid produced when LED module is worked effectively conducts to radiating subassembly via hot conduits and dispels the heat, improve the thermal diffusivity of system, effectively can ensure that the service life of car light.
[accompanying drawing explanation]
Fig. 1 is the exploded view of the LED circuit board that the utility model better embodiment provides;
Fig. 2 is the front view of LED circuit board in Fig. 1;
Fig. 3 is the partial cross section figure of LED circuit board in Fig. 1;
Fig. 4 is the sectional view of radiating subassembly in Fig. 1;
Fig. 5 is the sectional view of hot conduits in Fig. 1.
[detailed description of the invention]
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and the embodiments, the utility model is further elaborated.Should be appreciated that detailed description of the invention described herein only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with accompanying drawing, one detailed elaboration is done to specific embodiment of the utility model.
Please refer to Fig. 1, LED circuit board 100 of the present utility model, comprise circuit board 10, hot conduits 20, substrate 30, the LED light source 40 be electrically connected with substrate 30 and radiating subassembly 50.Circuit board 10 is attached at the surface of hot conduits 20, and can bend along the surface of hot conduits 20.Hot conduits 20 and radiating subassembly 50 are fixed together, the hot-fluid that LED light source 40 produces, and conduct to radiating subassembly 50 and dispel the heat, thus improve the radiating effect of system by hot conduits 20.
Incorporated by reference to Fig. 2, hot conduits 20 is the metal catheter of hollow, has cavity, and this cavity is built with working fluid 21 (as shown in Figure 5).By liquid vapour two phase change of working fluid 21 persistent loop, and vapour, the convection current that vapour returns toward liquid between the heat absorbing end and release end of heat of hot conduits of liquid fluid, enable the surface fast samming of hot conduits 20, improve the thermal conductivity of system.
Please consult Fig. 3 further, substrate 30 comprises end face and the bottom surface relative with this end face, and this bottom surface has line layer.LED light source 40 and this substrate 30 are electrically connected, and the bottom surface of substrate 30 fits in this circuit board 10.Substrate 30 realizes being electrically connected by the line layer of its bottom surface and circuit board 10.That is, LED light source 40 and circuit board 10 realize electrically conducting by substrate 30.A substrate 30 forms LED module with the LED light source 40 be fixed on this substrate 30.In order to ensure entirety can 360 degree luminous, the minimum number of LED module is 3 groups, and is evenly distributed on the surface of hot conduits 20.In other words, the angle between two adjacent LEDs module is 120 degree.In the present embodiment, the quantity of LED module is four, according to the position of circuit board 10, four LED modules are distributed in the periphery of hot conduits 20 equably, namely two adjacent LEDs module mutually vertically arrange and angle is 90 degree, thus launching of the uniform light that LED light source 40 is produced, improve the coverage of light, and then improve traffic safety.
Further, this substrate 30 is pasted together by gluing mode with circuit board 10.
Further, this substrate 30 can be one of aluminium sheet, copper coin.
Incorporated by reference to Fig. 1, Fig. 3 and Fig. 4, radiating subassembly 50 comprises radiator 51 and fan 52.This radiator 51 comprises connecting portion 511, fin portion 512 and fixed part 513.This connecting portion 511 has an accommodation space, and hot conduits 20 inserts this accommodation space away from one end of LED light source 40, and is fixed together by the mode of welding and hot conduits 20.Fin portion 512 is arranged at connecting portion 511 one end away from hot conduits 20, is provided with multiple spaced radiating fin.Fixed part 513 extends vertically upward from a radiating fin near connecting portion 511.Fixed part 513 is selectable is provided with a pair screw.Fan 52 coordinates to screw the top being fixed on fin portion 512 with this by securing member.
In the present embodiment, adopt side-blown mode to place fan 52, thus improve the active radiating efficiency of fan 52.Directly blow mode compared to of the prior art, effectively improve radiating efficiency.
As further improvement of the utility model, in other embodiments, LED circuit board 100 is also provided with lens 200.These lens 200 are fixed on the connecting portion 511 of radiator 51, and LED light source 40 is contained in lens 200.The light that multiple LED light source 40 sends, distributes to all directions through lens 200, reaches 360 degree of luminescences.
As can be seen here, the LED circuit board 100 that the utility model provides, circuit board 10 is fixed on the surface of hot conduits 20, and is electrically connected with LED light source 40, thus the heat produced by LED light source 40 is distributed by radiating subassembly 50.Thus improve the coverage of light, and hot conduits 20 and substrate 30 have high-termal conductivity, the effective conductive heat spreader 51 of the heat that LED light source 40 can be produced and fan 52 dispel the heat, and improve the thermal diffusivity of system, effectively can ensure that the service life of car light.
Above-described the utility model embodiment, does not form the restriction to the utility model protection domain.Any do within spirit of the present utility model and principle amendment, equivalent to replace and improvement etc., all should be included within claims of the present utility model.